West Sussex · England
Sand mastic for sash & case windows in Castle Town, West Sussex
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homeowners, landlords and businesses in Castle Town. Fully insured, ARBOMaster approved and guaranteed for a year.
- Mastic round period door frames that has failed
- Patchy fillers round a sash window
- Weathered mastic on the most exposed windows
What we cannot put right
We’d rather tell you now than do work that won’t last, so here’s what sealant cannot put right:
- Decayed frames that need repair
- Broken panes
- Sashes that need overhauling
If in doubt, ring 0345 464 0079 or send us an email and we’ll say what we think before booking.
Surfaces we seal
- Stone surrounds
- Period & listed homes
- Sash and case windows
- Tenement windows
- Timber door frames
- Brick reveals
Sand mastic for homes and businesses in Castle Town
If your home is listed or in a conservation area, check with your local planning authority if consent is needed before window work. Like-for-like sand mastic is often the preferred finish. Common call-outs are for failed mastic on an exposed elevation and draughts and rain around sash boxes, across tenement windows, period & listed homes and timber door frames.
Around Castle Town, many homes face open ground, so their windows and doors take the full weather. That exposure dries out and cracks the mastic around frames and sills faster.
We stand behind the work with a one-year guarantee.
- Location
- Castle Town (BN44)
- Wider area
- West Sussex
- Guarantee
- 12 months on all our work
- Quotes
- A clear price before any work starts
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Aftercare tips
Simple care keeps the joints in good condition. Our advice:
- Look over the window mastic once a year
- Clear gutters so water doesn’t pour onto the windows
- Find out about consent before window work on a listed home
- Ask us before painting near the mastic
Keep gutters and sills clear so water runs away from the surround. Water sitting against the mastic shortens its life.
It’s best to renew mastic before painting the windows. Painting over failed mastic hides the problem for a while.
How it works
On the day, there’s very little for you to do. Point us to the joints and we will get on with it. The job generally takes a few hours per window, depending on the condition of the joints, including the tidy-up. Somewhere like Castle Town needs a little journey planning: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- First we agree which joints need doing.
- We remove the old, loose mastic.
- Deep gaps are packed so the mastic sits at the right depth.
- We apply the mastic by hand and shape it.
- We dress the finish so it sits neatly against the masonry.
Before we arrive
- Let us know about parking restrictions
- Let us know about stairs, lifts or work at height
- Move anything stored near the joints
Ask for a quote
Want a quote for sand mastic? Please phone 0345 464 0079 or email us and tell us about the job. We will explain what we’d do and send you a clear quote before we start.
Advice
What affects the quote in Castle Town
Some jobs are bigger than they look, and some smaller. The main factors:
- The product the joint needs
- Mould in or behind the old joints
- Working hours on commercial sites
- How easy the joints are to reach
Combining jobs into one visit is usually more efficient than separate visits. We’ll give you a clear quote for the lot.
Asking for a quote
Photos help, but a description is a good start. Try to tell us:
- What’s wrong with the joints now
- Any access issues, like height or stairs
- Any previous sealing or DIY work
- A few pictures by email, if you can
To get a quote, call 0345 464 0079 or send us an email with the location and a short description of the problem. We’ll give you a clear quote before any work starts.
Landlords, agents and businesses in Castle Town
Failed sealant is one of the commonest items on a check-out report. Several properties can be quoted together.
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
What sand mastic looks like in Castle Town
Historic houses like Portslade Manor (about 4.2 miles south-east) are a reminder that the area around Castle Town has older buildings as well as new. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window. The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Schools such as Upper Beeding Primary School are buildings too, and its window and door frames need their mastic kept sound, just like a home’s. Rented homes near Shoreham-By-Sea station change hands often, and older sash windows in a rental need their mastic kept sound to keep the weather out.
Castle Town is about 3 miles north of Shoreham-by-Sea, in West Sussex. Jobs in Castle Town get the same care as everywhere else we work: old sealant removed completely, careful preparation and a 12-month guarantee. Castle Town is one of 371 places in West Sussex where we work. There’s also a page for Brighton, about 8 miles away.
Jobs for sand mastic in BN44 works the same way as everywhere else we cover. That includes homes and businesses on Henfield Road, The Bostal and Shoreham Road and the roads around them. We also cover Adur (2 miles south), Old Shoreham (3 miles south), Shoreham-by-Sea (3 miles south), Fulking (3 miles east) and Kingston by Sea (4 miles south-east). Within a short drive, we also cover Horsham (13 miles north), Worthing (6 miles south-west), Haywards Heath (12 miles north-east), Burgess Hill (9 miles north-east), Littlehampton (11 miles south-west) and Lancing (4 miles south).
Local landmarks in Castle Town
Typical jobs here are in homes near Steyning Grammar School and Hillside Park (parke sa Hiniusang Gingharian). The closest station to Castle Town is Shoreham-By-Sea station, about 3.2 miles south of the centre. Nearby you will also find Southlands Hospital (3.1 miles south-east) and Steyning Museum (1.5 miles north-west). Green spaces nearby include Mill Hill and Truleigh Hill.
Castle Town questions
Is Castle Town within the area you cover?
Yes, smaller places are covered as well as towns. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
Is Castle Town in your area for sand mastic?
Yes. We work across London and the South East, and Castle Town is part of that. Just ring 0345 464 0079 or email us with a few details of the job, and we will give you a clear price.
Do you hold any approvals?
Yes. We are an ARBOMaster approved applicator, which is run for the Arbo sealant brand.
Do you guarantee sand mastic work?
You get our 12-month guarantee on every job.
When will the new mastic be hard?
The surface skins quite quickly and it hardens fully over a longer time. The weather and joint depth both affect it.
Is it possible to paint over sand mastic?
It’s traditionally left unpainted, which is what traditional guidance recommends. Talk to us before any painting near it.
What is sand mastic?
Sand mastic is a traditional material for pointing round windows and doors. It combines sand with a linseed-oil-based binder.
Do you remove the old sealant?
Yes, every time. New silicone does not stick to old silicone, so the joint is cleaned back first.
What we’re called out for in Castle Town
Timber frames move with the seasons. That movement opens up the mastic joint little by little.
Most people get in touch when they notice something like this:
- Old sand mastic that has cracked, crumbled or fallen out
- Failed mastic on an exposed elevation
- Mastic round period door frames that has failed
- Cement or filler used on old window joints that has cracked
If you live in an older home near St Botolph's Church, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
What your quote should include
- What the quote includes, VAT included or not
- What the cure time is
- Whether they seal over old material or remove it
- How long the guarantee is
How the job changes by surface
Tenement and terrace windows
Where a building is shared, window work may involve neighbours so it’s worth checking responsibilities.
Sash and case windows
The box of a sash and case window sits in the stone or brick opening. The gap round it is pointed with sand mastic.